208696823 has 2 divisors, whose sum is σ = 208696824. Its totient is φ = 208696822.

The previous prime is 208696771. The next prime is 208696877. The reversal of 208696823 is 328696802.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 208696823 - 2¹² = 208692727 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (208606823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104348411 + 104348412.

It is an arithmetic number, because the mean of its divisors is an integer number (104348412).

Almost surely, 2^208696823 is an apocalyptic number.

208696823 is a deficient number, since it is larger than the sum of its proper divisors (1).

208696823 is an equidigital number, since it uses as much as digits as its factorization.

208696823 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 248832, while the sum is 44.

The square root of 208696823 is about 14446.3428936184. The cubic root of 208696823 is about 593.1601221520.

The spelling of 208696823 in words is "two hundred eight million, six hundred ninety-six thousand, eight hundred twenty-three".